造成内燃机轴瓦烧坏原因之一是轴承材质不符合要求,轴承间隙()。
参考答案:过大过小
------Look,it’s the most beautiful park___________ I’ve ever visited before.
-----Really?How I wish to go to see it for myself!.
A.that
B.which
C.whom
D.who
鱼类生长的三个要素是水温、()和食物